25.31 mm / 20.31 mm x 23.55 mm / 18.60 mm x 3.13 mm (thick) rectangular shape flange type mineral crystal, generic (not original) to fit Swiss Army®. Using generic crystals may devalue your watch.
* H. & W. Perrin Company Limited is independent of and not affiliated with or sponsored by Swiss Army®. Swiss Army® warranty does apply to parts supplied by H. & W. Perrin Company Limited.